media/video/capture/file_video_capture_device_factory.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/video/capture/file_video_capture_device_factory.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/files/file_path.h"
   9 #include "base/strings/sys_string_conversions.h"
  10 #include "media/base/media_switches.h"
  11 #include "media/video/capture/file_video_capture_device.h"
  12
  13 namespace media {
  14
  15 const char kFileVideoCaptureDeviceName[] =
  16     "/dev/placeholder-for-file-backed-fake-capture-device";
  17
  18 // Inspects the command line and retrieves the file path parameter.
  19 base::FilePath GetFilePathFromCommandLine() {
  20   base::FilePath command_line_file_path =
  21       base::CommandLine::ForCurrentProcess()->GetSwitchValuePath(
  22           switches::kUseFileForFakeVideoCapture);
  23   CHECK(!command_line_file_path.empty());
  24   return command_line_file_path;
  25 }
  26
  27 scoped_ptr<VideoCaptureDevice> FileVideoCaptureDeviceFactory::Create(
  28     const VideoCaptureDevice::Name& device_name) {
  29   DCHECK(thread_checker_.CalledOnValidThread());
  30 #if defined(OS_WIN)
  31   return scoped_ptr<VideoCaptureDevice>(new FileVideoCaptureDevice(
  32       base::FilePath(base::SysUTF8ToWide(device_name.name()))));
  33 #else
  34   return scoped_ptr<VideoCaptureDevice>(new FileVideoCaptureDevice(
  35       base::FilePath(device_name.name())));
  36 #endif
  37 }
  38
  39 void FileVideoCaptureDeviceFactory::GetDeviceNames(
  40     VideoCaptureDevice::Names* const device_names) {
  41   DCHECK(thread_checker_.CalledOnValidThread());
  42   DCHECK(device_names->empty());
  43   base::FilePath command_line_file_path = GetFilePathFromCommandLine();
  44 #if defined(OS_WIN)
  45   device_names->push_back(VideoCaptureDevice::Name(
  46       base::SysWideToUTF8(command_line_file_path.value()),
  47       kFileVideoCaptureDeviceName,
  48       VideoCaptureDevice::Name::DIRECT_SHOW));
  49 #elif defined(OS_MACOSX)
  50   device_names->push_back(VideoCaptureDevice::Name(
  51       command_line_file_path.value(),
  52       kFileVideoCaptureDeviceName,
  53       VideoCaptureDevice::Name::AVFOUNDATION));
  54 #else
  55   device_names->push_back(VideoCaptureDevice::Name(
  56       command_line_file_path.value(),
  57       kFileVideoCaptureDeviceName));
  58 #endif
  59 }
  60
  61 void FileVideoCaptureDeviceFactory::GetDeviceSupportedFormats(
  62     const VideoCaptureDevice::Name& device,
  63     VideoCaptureFormats* supported_formats) {
  64   DCHECK(thread_checker_.CalledOnValidThread());
  65   base::File file =
  66       FileVideoCaptureDevice::OpenFileForRead(GetFilePathFromCommandLine());
  67   VideoCaptureFormat capture_format;
  68   FileVideoCaptureDevice::ParseFileAndExtractVideoFormat(&file,
  69                                                          &capture_format);
  70   supported_formats->push_back(capture_format);
  71 }
  72
  73 }  // namespace media